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44ec2b63c5
freebsd-dev/sys
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Konstantin Belousov 44ec2b63c5 The vmem callback to reclaim kmem arena address space on low or 
fragmented conditions currently just wakes up the pagedaemon.  The
kmem arena is significantly smaller then the total available physical
memory, which means that there are loads where kmem arena space could
be exhausted, while there is a lot of pages available still.  The
woken up pagedaemon sees vm_pages_needed != 0, verifies the condition
vm_paging_needed() which is false, clears the pass and returns back to
sleep, not calling neither uma_reclaim() nor lowmem handler.

To handle low kmem arena conditions, create additional pagedaemon
thread which calls uma_reclaim() directly.  The thread sleeps on the
dedicated channel and kmem_reclaim() wakes the thread in addition to
the pagedaemon.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2015-05-09 20:08:36 +00:00
..
amd64 Rewrite amd64 PCID implementation to follow an algorithm described in 2015-05-09 19:11:01 +00:00
arm Pass the resources requests to the upper bus. 2015-05-09 03:39:18 +00:00
arm64 Port x86 busdma to ARM64 2015-05-08 18:47:19 +00:00
boot Move the text section to the start of the output file, so that when you 2015-05-08 19:43:53 +00:00
bsm
cam Handle EDQUOT backend storage errors same as ENOSPC. 2015-05-06 19:47:31 +00:00
cddl MFV r282630: 5809 Blowaway full receive in v1 pool causes kernel panic 2015-05-08 14:03:14 +00:00
compat Fix an error in r281551, part of the getfsstat() / kern_getfsstat() 2015-05-05 05:14:12 +00:00
conf Port x86 busdma to ARM64 2015-05-08 18:47:19 +00:00
contrib Move ALTQ from contrib to net/altq. The ALTQ code is for many years 2015-04-16 20:22:40 +00:00
crypto In the version of gcc in the FreeBSD tree, this modification was made to 2015-04-16 17:42:52 +00:00
ddb
dev If x86 CPU implementation of the MWAIT instruction reasonably 2015-05-09 12:28:48 +00:00
fs Fix the NFS server's handling of a bogus NFSv2 ROOT RPC. 2015-04-25 00:58:24 +00:00
gdb
geom Add apple-boot, apple-hfs and apple-ufs aliases to MBR scheme. 2015-05-05 09:33:02 +00:00
gnu The GNU Amlogic DTS files have some errors (e.g. bad register 2015-04-11 08:17:39 +00:00
i386 If x86 CPU implementation of the MWAIT instruction reasonably 2015-05-09 12:28:48 +00:00
isa
kern The vmem callback to reclaim kmem arena address space on low or 2015-05-09 20:08:36 +00:00
kgssapi
libkern Move zlib.c from net to libkern. 2015-04-22 14:38:58 +00:00
mips The add_bounce_page() function can be called when loading physical 2015-04-28 06:12:37 +00:00
modules Include makefiles necessary to make ixgbe build with the new code. 2015-04-30 22:56:43 +00:00
net Pass mtag argument into m_tag_locate() to continue the search from 2015-05-06 14:02:57 +00:00
net80211 Fix string concatenation - "wlan_##name" -> "wlan_" #name 2015-05-04 00:47:22 +00:00
netgraph Move zlib.c from net to libkern. 2015-04-22 14:38:58 +00:00
netinet Add a state transition call to show that we have entered TIME_WAIT. 2015-05-01 12:49:03 +00:00
netinet6 Mark data checksum as valid for multicast packets, that we send back 2015-05-07 14:17:43 +00:00
netipsec Fix the comment. We will not do SPD lookup again, because 2015-04-28 11:03:47 +00:00
netnatm
netpfil Fix panic when prepare_batch_buffer() returns error. 2015-05-06 07:53:43 +00:00
netsmb
nfs Avoid closing unallocated socket in case socreate fails. 2015-02-28 20:30:29 +00:00
nfsclient Remove some oldnfs remnants. 2015-04-18 16:08:06 +00:00
nfsserver Use M_SIZE() instead of hand-crafted (and mostly correct) NFSMSIZ() macro 2015-01-07 17:22:56 +00:00
nlm
ofed Don't drop the idr lock before verifying that the newly-inserted element 2015-05-02 00:26:38 +00:00
opencrypto Move zlib.c from net to libkern. 2015-04-22 14:38:58 +00:00
pc98 Fix kernel build ${MACHINE} path 2015-04-16 22:34:10 +00:00
powerpc Missed ofw_machdep.c in r282264. 2015-04-30 03:15:07 +00:00
rpc Remove hard limits on number of accepting NFS connections. 2015-04-07 10:25:27 +00:00
security cred: add proc_set_cred helper 2015-03-16 00:10:03 +00:00
sparc64 Update this driver to not save copies of registers that are no longer used 2015-04-24 13:12:04 +00:00
sys Convert hwpmc(4) debug printfs over to KTR. 2015-05-08 19:40:00 +00:00
teken mdoc: improvements to SEE ALSO. 2014-12-27 07:07:37 +00:00
tools
ufs Limit the number of cylinder groups that will be searched when 2015-04-24 23:27:50 +00:00
vm The vmem callback to reclaim kmem arena address space on low or 2015-05-09 20:08:36 +00:00
x86 Rewrite amd64 PCID implementation to follow an algorithm described in 2015-05-09 19:11:01 +00:00
xdr
xen xen: introduce a newbus function to allocate unused memory 2015-05-08 14:48:40 +00:00
Makefile